ERROR opening https://cactus.nci.nih.gov/chemical/structure/N%23Cc2ccccc2-c1cc%28-c4ncccc4%29cn%28c1%3DO%29-c3ccccc3/file?format=sdf&get3d=True  -- N%23Cc2ccccc2-c1cc%28-c4ncccc4%29cn%28c1%3DO%29-c3ccccc3 could not be loaded.